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Management of financial risk - Valuation inputs and relationships to fair value for loans and advances to customers (Details) - Loans and advances to customers from virtual bank - Level 3
Dec. 31, 2023
Discount rate  
Valuation inputs and relationships to fair value liabilities  
Range of inputs, minimum 7.09%
Range of inputs, maximum 10.29%
Prepayment ratio  
Valuation inputs and relationships to fair value liabilities  
Range of inputs, minimum 0.36%